Recently, I switched from a Samsung Galaxy 3 (bought in 2010) to a Samsung Galaxy S4 Mini (Jul 2014). In between, I also bought a Samsung Galaxy Tab 2 (bought in 2013).
On comparison, I noted a very interesting thing – software for editing Office documents. The Galaxy 3 has Think Office Free that allows us to EDIT documents. The Tab 2 has Polaris Office, that allows us to VIEW document. The Galaxy S4 Mini DOES NOT HAVE an office viewer or editor.
With each revision to a newer device, we are left with less features.